LaZnxFe1-xO3钙钛矿型纳米催化剂的制备、表征及其甲苯燃烧性能.pdf

2010 Chinese Journal of Catalysis Vol. 31 No. 7

Article ID: 0253-9837(2010)07-0747-04 DOI: -2067(09)60083-8 Article: 747–750
Synthesis, Characterization, and Performance of LaZnxFe1-xO3
Perovskite Nanocatalysts for bustion
Seyed Ali HOSSEINI1,*, Mohammad Taghi SADEGHI2, Abdolali ALEMI2, Aligholi NIAEI1,
Dariush SALARI1, Leila KAFI-AHMADI2
1Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran
2Department of anic Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran
Abstract: Nanostructured LaFeO3 and substituted LaZnxFe1-xO3 (x = , , , , and ) perovskites were synthesized by the sol-gel
bustion method and used in the bustion of toluene. Their structures and surface properties were investigated by X-ray
diffraction, Fourier transmission infrared spectroscopy, BET surface area, and scanning electron microscopy. Characterization data revealed
that the total insertion of zinc into LaFeO3 takes place when x ≤ . However, ZnO segregation occurs to some extent, especially at x > .
The performance of these perovskites was evaluated by bustion. The catalytic activity of the catalysts increased substantially
with an increase in zinc substitution. These results can be attributed to the cooperative effect between LaZnxFe1-xO3 and the zinc oxide
phases. The relative conc